I have the following table
I need to have the sum of MONTANT_TIT without repetitions.
Knowing that the NUMDOM can only have 1 MONTANT_TIT.
WHere are you displaying this data? I mean which object you are displaying this data in Qlikview. Usually QV will take care of the duplicates automatically unless you have any other dimension which is not duplicate and linked to this data.
You can certainly use Sunny's Aggr commands, but is there a reason why you need the extra rows in the table? Do each of those rows contain some extra information that we are not seeing? If not, you should consider revising the load script so that the table only has unique rows. Try using "Load Distinct" in the load script.
Just my 2 cents but,
If I were you I'd probably create a separate table that is an aggregation of this table. It seems to me, that with the Qlik associative engine, you really don't need a table with lot's of repeated information. Create a table with one row per NumDot.
But, hey, that's just my opinion, man.